随笔档案

    1。action类中的方法：
            public ActionForward updateRegister(ActionMapping mapping,ActionForm form,HttpServletRequest req,
          HttpServletResponse res)throws Exception{
          MyRegisterInfo register = new MyRegisterInfo();
          MyRegisterActionForm registerForm = (MyRegisterActionForm) form;
          this.beanCopy(register,form);
          MyRegisterService service =  (MyRegisterService) this.getBean("myRegisterService");
          if (service.updateRegister(register))
              {
              PageInfo page = new PageInfo(req.getParameterMap());
              req.setAttribute("registerList",service.listRegister(page));
              return  mapping.findForward("list-ok");

          }
        
  2。sevice中的方法体为
      public boolean updateRegister(MyRegisterInfo myRegisterInfo)
        {
        MyRegisterDAO dao = (MyRegisterDAO) this.getBaseDAO();
        dao.update(myRegisterInfo);
        return true;
    }  
  3。dao中的方法体为
    public void update(Object obj) {
        getHibernateTemplate().saveOrUpdate(obj);
    }
 
  4。因为registerform的类为四个属性的getter和setter
      private String name;
      private String password;
      private String repassword;
      private Long id;
     //一开始因为少了id，从页面上传来的form没有id，调用saveOrUpdate（）方法时，hibernate调用的sql语句是insert，而不是update语句，因此页面上原来的行不仅还在，而且还不断有新行增加。